So, mcgeorge has the TRD supercharger listed on his site as pushing 5psi. Now, I've just been looking at turbos, and I understand that the more boost (psi) you put, the more power you'll put out. 6psi, 8psi, 12psi, whatever. What I want to know is if a supercharger is the same way? Can you adjust the psi on a supercharger to make it crank out more power?

Yes, but on a supercharger you need to decrease the size of the pulley on it to make more power. However, the tC's motor is a high-compression motor so you'll want to be careful when boosting more. Otherwise all that will be blown is your rings or head gasket :nails:

people just always want more power hehe

The reason I'm asking is cause I think the scionspeed turbo is pushing 15psi now! I think 8psi or 10psi without major engine mods. So I wanted to know how it would be with the TRD SC. I dont' know much about SC.

yup they sell boost pullys for that

But if I'm not mistaken, witha turbo, you can get a boost controller to make boost adjustments simple. For example, running 6psi daily, then turn it up to 12psi for track days? Is anything like this possible with a SC?

But if I'm not mistaken, witha turbo, you can get a boost controller to make boost adjustments simple. For example, running 6psi daily, then turn it up to 12psi for track days? Is anything like this possible with a SC?

Not anything where you can just turn a dial. All that you can do with a supercharger is press on a quick swap pulley hub. That way all you need to do is remove the belt then remove a few allen bolts and swap the pulley (otherwise you'll need a pulley removal tool to swap them).

Yes, but on a supercharger you need to decrease the size of the pulley on it to make more power. However, the tC's motor is a high-compression motor so you'll want to be careful when boosting more. Otherwise all that will be blown is your rings or head gasket :nails:

I wouldn’t say 9.6:1 is a high compression. In some respects, yes, but even when it comes to forced induction there are far worse, or higher, compression ratios to deal with. Such as the K20A3's 11:1 ratio, which, by the way, there are pre-fabricated, bolt on, superchargers available for that put out some very nice numbers that don’t require any internal modifications to lower the compression ratio, nor racing fuel. I know what your saying though, I'm sure 8.6:1 would be more optimal for boost, but 9.6:1 is a whole lot better to work with then 11:1. :D

McGeorge does not list the PSI for the TRD tC supercharger. Where did you locate that info?

Yes, but on a supercharger you need to decrease the size of the pulley on it to make more power. However, the tC's motor is a high-compression motor so you'll want to be careful when boosting more. Otherwise all that will be blown is your rings or head gasket :nails:

no the TC motor is not high compression. hish compression is more like 10:1 or 11:1. the TC is more like 9:1. The reason why the compression is low on this motor is, of course the option to add on the TRD supercharger. now if it came from the factory with a high compression motor, and we install the SC. then after a long period of time the motor will blow. :no:. there you go just to clear up some confusion.

McGeorge does not list the PSI for the TRD tC supercharger. Where did you locate that info?
Sorry. I read it from this February acticle from Road & Track http://www.roadandtrack.com/article.asp?section_id=3&article_id=1823

As a general guidline every 1 psi of boost equates to aproximately 10 hp gain. So if the supercharger is running 5 psi that is a 50 hp gain at the crank, making about 210hp overall.

As a general guidline every 1 psi of boost equates to aproximately 10 hp gain. So if the supercharger is running 5 psi that is a 50 hp gain at the crank, making about 210hp overall.

Not quite. Not every motor isd the same. 5 psi in the tc with a compression ratio of 9.6:1 will make more power than say GM's 3800 Supercharged Series II which has an 8.2:1 compression ratio. When I had my Buick (with the aforementioned motor) I was running about 14psi... and I know I wan;t making an extra 140 HP from it.

I wouldn't run over 6psi on stock internal. You may get lucky and not blown your engine but your internals will get damaged.

I'm pertty sure the tC can handle in everyday basis 6-8 psi easily, consider the TRD supercharger kit will come with ECU upgrade and (4) fuel injectors upgrade. A 9.6:1 compression, along with the known Toyota reliabilty, is good for med-low high boost, i.e from 6-12 psi in either force induction: Turbo or superchager. If the F.I. setup includes an intercooler setup then the levels can be higher like 12-15 psi

ive seen other cars with aftermarket SC. since i dont know that much about Supercharging, can you add a intercooler with the kit? and will it affect the performance?

I just want to say this about boosting thier isn't that much diffrent in running
9.6-1 cr and boosting 5psi
then running
8.6-1 cr and boosting 10psi.
All I am saying higher compression = less boost and lower compression = higher boost. Unless your planing on boosting 14 or more psi the factory cr is fine.

think about it all you are doing is decreasing the cr to boost more just to get the same if you keep the cr and boost less. I hope every sees what I am saying.

Not quite. Not every motor isd the same. 5 psi in the tc with a compression ratio of 9.6:1 will make more power than say GM's 3800 Supercharged Series II which has an 8.2:1 compression ratio. When I had my Buick (with the aforementioned motor) I was running about 14psi... and I know I wan;t making an extra 140 HP from it.

No kidding.... I said as a general guidline not as in its a fact.... I realize its not the same for every motor... :roll:

McGeorge does not list the PSI for the TRD tC supercharger. Where did you locate that info?
Sorry. I read it from this February acticle from Road & Track http://www.roadandtrack.com/article.asp?section_id=3&article_id=1823

I was quoted 6 PSI from Scion sources. That is a safe number, which is why it is still waranteed. If you go much above 8 on the tC, then I would start thinking about other mods as well.

So let me see if I get this right. If the TRD supercharger comes at 6psi, all I have to do it get a different size pully to up it to 8psi and get more power?

So let me see if I get this right. If the TRD supercharger comes at 6psi, all I have to do it get a different size pully to up it to 8psi and get more power?

Yes if someone makes them. The smaller the pulley the more it turns the supercharger = more boost.

mr meaty,
get an itty-bitty pulley , void your warranty, blow your engine, post some pics.
do it, or you're a p@$$y.
that'll be sweet.

The reason I'm asking is cause I think the scionspeed turbo is pushing 15psi now! I think 8psi or 10psi without major engine mods. So I wanted to know how it would be with the TRD SC. I dont' know much about SC.

Stage 2 kit (basicly a stage one with intercooler ) from scionspeed comes with a 7 and a 10 lbs spring

You can use this site to fool around with the boost, to give you a general idea of how your car will run with your input setup. It does not take into consideration however the integrity of your engine.

http://www.superchargersonline.com/hp_calculator.asp

McGeorge does not list the PSI for the TRD tC supercharger. Where did you locate that info?
Sorry. I read it from this February acticle from Road & Track http://www.roadandtrack.com/article.asp?section_id=3&article_id=1823

a little off topic but it sure it weird that they programmed the stereo in the tC to say "Cobalt" :no:

McGeorge does not list the PSI for the TRD tC supercharger. Where did you locate that info?
Sorry. I read it from this February acticle from Road & Track http://www.roadandtrack.com/article.asp?section_id=3&article_id=1823

a little off topic but it sure it weird that they programmed the stereo in the tC to say "Cobalt" :no:

that's the name of the color when you push the color button on the disc changer.... :roll:

and I'm going to get a smaller pulley when I get the supercharger, I don't drive as much as I'd like to and put a max of 10k miles on my cars per year, so even in 10 years I'd only hit the "half-way point" of the camry engines, and I don't see myself in the TC long after I've paid it off in a few years..... sooooo... BLOW THE DOORS OFF!!!

that's the name of the color when you push the color button on the disc changer...

ah, i see. i thought they were trying to be funny.

So you figure running like 8psi should be pretty safe. Especially If your gonna be a daily driver. Iam guessing that will get you like 200 to the wheels. no?

You can use this site to fool around with the boost, to give you a general idea of how your car will run with your input setup. It does not take into consideration however the integrity of your engine.

http://www.superchargersonline.com/hp_calculator.asp

Wow I hope this calculator is right. According to it, with 8psi and a 2-core intercooler, the tC should go from 160hp to 252hp! :pray:

With 5psi and no intercooler, it should put out 214hp (Pretty close to what the TRD produces, supposedly). 8psi it is then. Come on TRD, where's our supercharger :question:

Yeah I saw that too. I want supercharger now..........

According to my source it should be out in April, if I rememberthe date properly. I will check into again and see costs, psi and estimated HP gain.....

Yeah I saw that too. I want supercharger now..........

According to my source it should be out in April, if I rememberthe date properly. I will check into again and see costs, psi and estimated HP gain.....
It's been pushed back. TRD is saying it should be out in fall/winter, before the end of the year.

is anyone else working on a supercharger other then TRD?

probably in some time well have a load of them out for the tC. But as for 250hp that would be hot. I dont think that by bringing it up to 8psi you'll damage anything.

probably in some time well have a load of them out for the tC. But as for 250hp that would be hot. I dont think that by bringing it up to 8psi you'll damage anything.

I agree, people run 8psi with a turbo setup for years on a lot less reliable engines than what we have with minor issues. With a 9.6:1 compression ratio, it looks very feasible.